Numerical Simulation and Experimental Studies of Surface Topography of Laser Textured Roller
Wear property and the quality of the rolled sheet are directly affected by the surface topography of laser textured roller. To investigate the surface deformation evolution progress and mechanics of the molten pool, two-dimensional computational model was built and Volume-of-Fluid model was used for the surface deformation simulation and the streamlines and velocity distribution during the laser melting were studied. Then the numerical simulated surface deformation of laser textured pits was validated through experiments. The results show the central molten metal is pull to the edge under surface tension driven flow. The lowest position of gas-liquid interface exists in the pool center with maximum heat flux and two types of bump shapes can be obtained during the processing. The reflux loop quantity decreases and convection center move closer to the surface with time, while the velocity of the bump surface is maximal.
pulse laser surface topography Volume-of-Fluid model Numerical simulation
Hongbin LIU Daping WAN Dejin HU
School of Mechanical and Power Engineering, Shanghai Jiaotong University, Shanghai 200030, P.R China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）